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Family: Ericaceae
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Rhododendron hongkongense Hutch.
Collector/Expedition: Chun, W.Y.
Collection date: 26 October 1930
Filing region: Inner China, Korea and Taiwan
Country of origin: China
Barcode: E00173705
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Family: Ericaceae
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Rhododendron hongkongense Hutch.
Collector/Expedition: Baretto, G. D'a
Collection number: 278
Collection date: March 1985
Filing region: Inner China, Korea and Taiwan
Country of origin: China
Barcode: E00173706
Label data partially captured
Family: Ericaceae
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Rhododendron hongkongense Hutch.
Collector/Expedition: Murata, J.
Collection number: 17551
Collection date: 16 March 1985
Filing region: Inner China, Korea and Taiwan
Country of origin: China
Barcode: E00173707
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Family: Ericaceae
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Rhododendron hongkongense Hutch.
Collector/Expedition: Patrick, J.
Garden collector: Cultivated Plant of the RBGE (CULTE)
Garden collection number: 15498
Filing region: Inner China, Korea and Taiwan
Country of origin: China
Barcode: E00247695
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Family: Ericaceae
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Rhododendron hongkongense Hutch.
Collector/Expedition: Eyre
Collection date: March 1849
Filing region: Inner China, Korea and Taiwan
Country of origin: Hong Kong
possible type of Rhododendron hongkongense Hutch.
syntype of Azalea myrtifolia Champ.
Barcode: E00010335
Label data completely captured
OCR:
%??^L S O .t?<^Alc?;;l..?c3^^ INDEX FLOH^ SINEI?SIS. ^ ^ J>kU3^. Determinavit it cP?t. Cotype /7 royal BOTANIC GARDEN E00010335IN DEFENS Royal Botanic Garden Edinburgh EH3 5LR Telephone 031-552 7171 Mrs G Barretto Kadoorie Experimental and Extension Farm Lam Kam Road NT HONG KONG 27 Aufpist 198? Dear Mrs Barretto Thank you for your recent letter and the Ithododendron specimens which arrived safely. It was good of you to send such helpful information. As you know I- am not a Ithododendron specialist - I view Rhododendron taxonomy as dangerous territoiy to enter! There are differing schools of thou^t, and feelings sometimes run hi^. Mr Davidian went over the specimens - yours and the large collections of Rh. ovatum and Bh. honskongense vrhich we house. In the second volume (part 1) of his Rhododendron book - currently in press - he describes 5h.ovatum and in the discussion - ie he does not formally 'sink' it - he considers Rh. hongjcongense as a local fom of it. Your material served to firm up this opinion. I have also looked at the specimens involved (ie ventujring into dangerous territory) and the original and later descriptions. The differences given between the two seem to be inadeqxiate to separate species - even the hairj'' winter bud character seems to be inconstant. Certainly leaf shape and calyx and corolla characters merge into each other - for leaves your samples show quite a wide range. Recently we had a Chinese botanist working here and on his annotation labels he has "Rh. ovatum subsp. hon^ongense (Hutchison) T.L. Ming" - this has not yet been published but is presumably the same that will be used in the main Plora of China. So there are 3 current opinions: 2 allied species, one species with 2 subspecies, or one rather variable species (Rh. ovatm). From your information and specimens, I would favotir the latter, but subspecies rank could be appropriate if there were, throu^out the overall range of the species (ie China & Hong Kong), good charax?ter differences linked with geographical distribution. We will incorporate your dried specimens and letters into the herbarium. With best wishes, Yours sincerelyG. O. FORM 1 10000/6-65. KADOORIE EXPERIMENTAL AND EXTENSION FARM LAM KAM ROAD, N.T., HONG KONG. ^ ^ if # # # August loth, 1987. Dr. I. C. Fedge, Royal Botanic Garden, Edinburgh ^313 5L? jcotland, U.K. Identification of sp. . Wedge, ododendron ovatum/R.hongkongensis I refer to correspondence betn^-een us regarding the identification of Rhododendron species growing in Kadoorie Garden. Your lest letter was dated 10th Sep+-ember 1986 and mine lOth October. As agreed, I collected flowering branchlets in March 1987 from two bushes. These were forwarded to the Hongkong Herbarium. Thev were separated there, the KK Herbarium retaining a portion of Lot 1 and Lot 2 and returned the balance to me for despatch to you. These are enclosed. The HK Herbarium studied this materiell and are still of the opinion they represent U .honfrkongensis. ?orne time later, in June, I collected green fruit from seven plants, for further check by our Herbarium. They declared the fruit bore characters of R.hongkongen?i?. Six lots are now """ ^ ?III A 0 enclosed for your study, No.l i^ot appears to have/astray. The Herbarium base their conclusions not on leaf shape or flower colour but on floral differences, and these differences point to the plants being R.honirkon<iensis. I enclose a resimie of the differences between the two species as set out in the Chinese Icon.Cormop.Sinic Vol.Ill, as translated by the ?1K Herbarium and by Judy Young and LIU Sheng-Chang, "Rhododendrons of (Ihina", pub. jixiford Mort. As can be seen, if one followed the Chinese, that there are differences betvttieu R.ovatura and U.hon^konv-iensis vis-a-vis the flowers. If we ^vere to follow western authorities, you will note the variation in leaf size and shape in the material from the six plants. Grateful for your comments. The next bit of sleuthing I will do is to collect ripe fruit from the same plants. you. Manj thanks for your help and regret having to trouble Sincerely yours, (Mrs . jGloria Barretto m o fD C P ?3 ^ pu w O P-O o? o Ou o cr ?-? CO o (Xi H-<; H. P et T t?* . M P5 ^ h- ^ ?5 .CT (a V o o ?3 o < p?- <rD o n rf ar H' I? W B o B 3 g at H? V M w V* ?? O n ?L X H' H* ? M M rf ar H' I? W O (ti CL O ? M ts p ? tri cr M O c ? ? ?Q O Q Pu y P- 33 H- V* U? O V Q cn ps p. xr ?3 o v- o M M M S?5 ?3 ir pu S? > jr C Gq ? M ? ci- et T t?* . M P5 ^ h- ^ ?5 .CT (a V M {?> 00 M {?> 00 -?- r ? B ta 3 w H ? .-I- 2 H S OD ? T? O p ? 3 0 3. 22 o 01 2 o ? X o 9 QfQ W O W w > ? o o w hH ? m h? m 9 ??4 S ? t* ? H ? ? GO O a; ? SRoyal Botanic Garden Edinburgh EH3 5LR Telephone 031-5527171 Mrs G Barretto Kadoorie Farm & Garden Lam Tsuen Valley Lam Kam Road Taipo New Territories HONG KONG 10 September 1986 Dear Mrs Barretto Please excuse the long delay in replying to your query about the white Hong Kong Rhododendron> I've shown your letter to Mr Davidian and the following comments are mostly his* He was quite sure that the specimens you sent previously were indeed R? ovatum; and that it was possible that the specimens you sent to the Hong Kong herbarium were collected from a different specimen. The only answer of course is that you should send us in March 198? specimens, from truly identical bushes, of flowers and capsules; as in the last paragraph of your letter. If I may add a comment of my own, speaking as a general plant taxonomist, I would like to know if, in the field, the characters used by Rhododendron specialists to separate R> ovatum and R? hongkongense really do hold true? It seems to me that the supposed differences are rather imprecise and not very convincing to separate the species. But it is only somebody in the field who sits down among the bushes with the descriptions of both and either convinces him/herself that the differences are clear ~ or else finds that the two supposed species in fact intergrade and only one species is involved. I would, in general, be a bit suspicious of a situation where there are two species, separated by characters of leaf shape and flower colour, growing in the same locality. Different varieties possibly but doubtfully different species. However Rhododendrons do behave their own way and there could be two perfectly good species growing side by sidei Best wishes. Yours sincerely I C Hedge ROYAL BOTANIC GARDEN EDINBURGH copyright reservedG. O. FORM 1 10000/6-65. KADOORIE EXPERIMENTAL AND EXTENSION FARM LAM KAM ROAD, N.T., HONG KONG. 7^ ? ff ^ & June 21st, 1906. Dr. Ian Hedge, Royal Botanic Garden, Edinburgh EH3 5^ Scotland. Dear Dr. Hedge, The question of the identity of the white rhododendron species of Hongkong has reared its head once more. I refer to your letter of 8th August 19?5 wherein you identified the specime ns I forwarded some months before that, as Rhododendron ovatum. And, under cover of my letter of March 6 1906 I sent capsules/seeds of that flowering (19?5), that you acknowledged per yours of April 4th. In March this year, I sent fresh flowering specimens of this white rhododendron to the Curator, Hongkong Herbarium, with copies of relevant correspondence between you and I, re your identification of R. ovatum. The HK Herbarium hgd also been forwarded capsules/seeds from the same collection as yourself. 5-, Enclosed is a copy of the Curator's reply, a A^you can see, they maintain R. hongkongensis, based on description from the Chinese Icon. Cormop. Sinic., Vol. Ill (I974). At this juncture I would like to say:- a). there might possibly have been two different species growing on that huge flank of mountain where we air-layered plants growing in nature ; b). of the plants we have from this layering, that there are therefore, two species; c). that I did not collect flowers from exactly^h e same plants for yourself, and the HK Herbarium. ' d). -do.- for the capsules/seeds. Naturally, I am looking forwards to your comments. I would like to add that if it would help, I could, in March 19?7, forward you and the HK Herbarium specimens from truly the identical bushes of flowers {19?7 fl'ing) and capsules {from 1986 fl'ing). Enes. Sincerely yours, (Gf^ria Barretto) ROYAL BOTANIC GARDEN EDINBURGH copyright reservedo. o. FORM 2 3000/1 2-84 E?DOORIE EXPERIMENTAL & EXTENSION FARM AND BOTANIC GARDENS Lam Kam Road, Tai Po, New Territories, Hong Kong Tel. Nos. 0-981317, 0-981604 m m m m m ' ^ il- ' Ref. March 6th, 19^6. Dr. I.G.Hedge, Curator, The Herbarium, Royal Botanic Garden, Edinburgh, EH3 5LR Scotland. Dear Dr. Hedge, As a follow-up to our correspondence on the Rhododendron ovatum PI. of Hongkong (your last letter on this was dated Aug.S, 19?5) I have pleasure in enclosing seeds collected from the same plants from which your identification was based. Also enclosed are seed capsules for your herbarium records. I hope that the seeds are viable, they were collected about February 15th, this year. I Yours ^s. G. Barrett"o I I I />6- ? I IItesumg of des.fript.?ons; R?ovatwa^ and ..,H..iiptij^kon^ensis U-j tryri?l?.f-oc' fi-OM ?r^n? .(:;or!MO|?Ti7?T.?^"?''/LT^^^^ V V'K"'"'?lourivo?icr Hei-barimn " " " " " 'f'ol.IIl by Judy Vouug^i/ LIU ,b,hen?-chang 7 of v?hina, pub.?inford ? Mort J ? vh OC! ode lid ron oVcit urn f'abit: (1) evergreen, to 4 m hic^h A2) eA^ergreen, to 4 m high iJruiichlets/ (1) glfiiidulnr pilose Shoots 1^2} Hpar?iel}' stipulate-^landular ? pubexcent. Leaves. (^1) ov[(t0 j.? ? 5 era longj 1.6 ? 2.5 cm wxds, laucroiiate or inucroiiuleite at apf?x^ obtuse, haii'v on irtidrib. ix't iole u]i to 8 liun Ion."; (2) coiTaceous, ovate, 3.7 - 5 en, loii^, 1.8 - 2.5 cm wide, apex acute or obtuse, conspicuously mucronate, base rounded, upper surface short-hairy only on the midrib^ no-f- seal}-. P'^Ciole to 8 mm lon^, T)ub.:'sce)it. Flowers: (1) pale ;purple in Seminal clusters^ corolla v.dtb piuk siHjts, pedicel I.G cb! !long calyx 'i-lobed, 5 hot long, pubescent at baite_, i*lands on surface stap'.ens 5, ovary with sliort bristle hairs style" ['{airless rol la pale purple, piule (?otted, glabrous outside, coi'olla tube pubescent, with in, lt)bes 5 pedicel 1.6 cri Ion?' clad with short-stalked glands afrf white powder calyx large, S-lobed, about 5 ?iiin long, glabrous except at the base, niar?ins glabrous, only the exterior of the t-Iiov^t calyx tube white powderv ? - and glandular stamens 5^ ovaiy short setose s'tyle glabrous flowers solitary, 1 per flov;er bud, ]>roduced from leaf ?lv??s at brauch tip ?Capsules (1) 8 min long, ovate, with shoi't "oristle hairs (2) 8 jri/i! long, ovoid, ?short sotv'^se, enclosed within the enl<i.rged persistent calyx. 6 7 8 9 10 copyright reserved ROYAL BOTANIC GARDEN EDINBURGH iUuidodendron h?tiTkonFensis ?maUt: (1) this-species is -quite similar to isvovatun in habit b other characters, however the v'iliter lilt it. l?airless. (2) <-his species cloael/ resembles K.o\/c-,tu'-i in hi.bit iJ ijeveral other characters, except that the winter bud scales are glabrous outside. Lccwes: (1) oblanceolat^?obova.te , .1. ? (2) fiore or less oblanceolate ov obov;tte-lanceolate, tupersu tovaras the oa-:e iind broadest at or above the laiddle. ?n|-?Lowers: (1) ,'?bite !? corolla with ?nirple spots calyx smaller than those of R.ovatuni, rounded with glandular hairs at the margin, (2) i-i'hite, wi.'f'h s?iall purple-lilac s?'Ots ou upper part of corolla tube ,iuterior calvx lobes snaller thi?n R.ovrituf'!, ixvunded, densely clad at the margin with s!iort-stal!fed glandular hairs. Capsules: U) shorter than 8 r,u;i cuver-ud with fiuricute Ci-idennis U) ve)-rucose, le^ss rbeu 8 ".i-ii long, with persistent calyx lobes that are often reflexed ?
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